I have a 2009 TCR Adv SL so can easily accommodate an internal battery and a mostly internal wiring setup, but in the frames current state, I would need to run the rear mech cable external, and this would look OK, especially as the frame is black.
I am considering modifying the frame for a full internal fit. To do this I would need to drill one hole in the rear drop out and enlarge the front mech cable drilling. On the 2009 model the rear drop outs are aluminium bonded into the tubes. The front mech is easy as the under BB hole is plenty big enough, it is just a case of enlarging the existing drilling on the upper BB area with a fine circular file.
I have attached photos showing where the cable exits the frame in its current configuration, where the hole would need to be drilled, and an example of how the original Di2 only frames from giant were drilled (this is what I want to achieve). Basically, the original TCR Di2 only frames were exactly the same in the rear except for this one hole in the rear drop out.
Secondly I am considering removing the existing cable stops that are riveted onto the frame tubes. I 'think' that this could be done quite cleanly as I can pass a piece of paper between the stop outer edge and the tube, so it appears that the frame clear coat was applied before the stops were fitted, however, the unknown is whether the stops are both riveted and bonded to the frame. I am worried that if I drill the rivet heads out that the stops still don't budge. If they were bonded then removal could be a bit messy.
The frame is well out of warranty and re-sale is not a concern. So, I would like to here from anyone out there who has attempted similar or who is a bit of a frame structural expert.
Photos are here: https://onedrive.live.com/?cid=CE461544A39EEF41&id=CE461544A39EEF41%21473
Thanks in advance for any info/advice.
As for the stops, they are typically not bonded. Even if they are, you can refinish that small area and make it look good, especially since the stops aren't right up on the top of tubes in plain view. Definitely go full-internal. There are two versions of the little Shimano grommets, one for oval holes (which work a bit more easily) and one for round ones. You can use a rattail file to shape a hole for the oval holes, but either version will work.
The only question remaining now is wether to drill the drop our for the rear mech cable, or not?
Really looking for some expert advice on this one. Part of me thinks that this is all that giant did to the early di2 only frames, but at the same time I am mindful that they could have had a specially strengthened drop out for this frame.
My current thinking is that it is less of a risk drilling the aluminum, than drilling a hole or enlarging the cable stop holes in the carbon chain stay.
Is this going to be a problem? I cannot see why myself, but would like to be sure.
Still after any advice on drilling the rear drop out.
Thanks for reading.
The rear dropout on the SL3 is hollow and after researching pictures of it, it was a no brainer to drill it there. The main reason was the visual appeal. The older Tarmac frame was drilled where the rear cable stop was.
If you indeed drill out the rivets for the cable stops, a 1/8" carbon fiber rod [and epoxy] works well to plug the hole. The cable stops did not appear to be glued, just riveted.
BTW, I installed a EPS system, not Di2.
Butcher, thanks for your info, that is what I really wanted to here . The TCR dropouts are kind of hollow too, in that they comprise of 3 reinforced ribs with hollow sections in between that have been filled in, so in effect I m drilling into the infill section.
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